Competitor rigs are mechanically simple and easy to operate.
The rigs are designed for use by a single operator and drilling can begin within minutes of arrival on site.
Because the units are light in weight, site disturbance is minimised, making the Competitor ideal for use on environmentally-sensitive sites.
The rigs are highly mobile and maneuverable, they can be tracked up slopes and can pass through a standard domestic doorway. The Competitor is ideal for work on sites with restricted access, close-up against walls and inside buildings, where it would be otherwise be difficult to obtain samples.
Sampling is achieved by a percussive method. The drive mechanism consists of a chain-driven drop weight that repeatedly strikes an anvil, driving the rods and sample tubes into the ground. The rig can drive sample tubes into all soil types, but it is not designed for sampling or coring in hard rocks.
The weight and the drop height are adjustable, enabling Standard Penetration Tests and Dynamic Probing (Lost Cone) Tests to be carried out as well as soil sampling. Blow rates up to 50 per minute can be achieved when driving sample tubes into the ground.
After tools have been driven into the ground to the required depth, they can be easily extracted using the integral hydraulic jack which has a 7-tonne pullback capacity. Extraction of sample tubes is achieved without having to re-position the rig.
In many situations it is necessary to break through a hard surface prior to sampling or testing the ground. For this purpose the Competitor can be supplied with an optional rotary attachment, designed for coring through concrete or other hard surfaces at ground level. With the rotary attachment fitted to the rig, it is not necessary to purchase additional concrete coring equipment or employ specialist concrete coring contractors, resulting in a significant reduction in project costs.
To prevent the borehole from collapsing when extracting samples, casing tubes can be driven into the ground at the same time as the soil samplers. This method, referred to as our Simultaneous Casing System, has been designed specifically for use with the Competitor. As well as preventing collapse of the borehole, the method ensures that there is no cross-contamination between successive samples, even when sampling very loose ground.
See also:
Overview
Rig Options
Spare Parts
Technical Specification
Ancillary Equipment
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